¿Cómo responden los sistemas de su cuerpo para mantener la homeostasis mientras hace ejercicio? 1.Sistema respiratorio
2.Sistema circulatorio
3.Sistema digestivo

2. sistema circulatorio porque para adaptarse al aumento de la actividad el sistema circulatorio debe controlar adecuadamente el transporte de oxígeno y dióxido de carbono

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.